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Ugh... Comcast...

Jeff7181

Lifer
I just moved into a condo and decided to get Comcast. My other choices are WOW and UVerse. I decided go with Comcast because it's familiar and the quality was excellent in the next town over. Here... not so much. I get on average 2-3 Mbps downstream. The weird thing is, my upstream bandwidth is about 5 Mbps with Powerboost... under 1 Mbps without.

Think this is because I'm in a condo and sharing bandwidth? The installer that came out here said he's worked this area for about 3 years and this is the first time he's been to my building so I don't think many people here have Comcast.

I think when my introductory price is over I'm going to switch to UVerse and see if that's any better.
 
are you D2 or D3? D2 uses one channel so yeah bunch of leechers will effect you. D3 modem uses 4 downstreams so you can have up to 120-150meg down - this relieves you.

what you need to do is a few days sample at all hours - it may be they leech at night/day only - which is what i see with my D2. i get 42mbps down and 5-7 up during the night but only 20-30 down during the day (blast! with D2).

D3 modems are nasty - if one or two downlinks fail the whole modem retrains - 4 down and 1 up takes alot more time to lock than 1down/1up - so the fact your current D2 modem retrains about 5-10 times a day now (10-20 seconds each time) you will notice when it happens on D3 and takes 1 minute to retrain since voice and data being out for a minute all day/night long will make you punch walls.

d2 = 1 up/1 down
d3 = 4 down/1 up (or more)
 
My modem is D2. Same model that I had at my previous home. RCA/Thompson DCM425.

So are you saying even though D3 may have the potential to provide more bandwidth, it's not necessarily better because it takes longer to retrain?
 
correct. it could be just the early days of their head-end software too but D3 been out for a while here. It was damn near impossible to get a D2 modem back; they only want to give out D3's now. wierd thing is both upstreams where single channel qam16 in both modes.

the tap was pretty old and pretty far away at least 100 meters.
 
I had somewhat of a similar problem and for me the apartment building I was living in only had one tap from the main, and then in the basement they used a signal amplifier with splits. After they wired each apartment for their own connections it was much better. Again this was crapcast.
 
I don't think it's internal cabling because I get a full 16 Mbps down and 5 Mbps up when running a speed test on comcast.net. Anything outside of Comcast's network slows down to about 4-5 down and 1 up.
 
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